// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include <stdint.h>

#include "base/bind.h"
#include "base/files/file_path.h"
#include "base/macros.h"
#include "base/synchronization/waitable_event.h"
#include "media/base/test_data_util.h"
#include "media/ffmpeg/ffmpeg_common.h"
#include "media/filters/blocking_url_protocol.h"
#include "media/filters/file_data_source.h"
#include "testing/gmock/include/gmock/gmock.h"
#include "testing/gtest/include/gtest/gtest.h"

namespace media {

class BlockingUrlProtocolTest : public testing::Test {
public:
    BlockingUrlProtocolTest()
        : url_protocol_(&data_source_,
            base::Bind(&BlockingUrlProtocolTest::OnDataSourceError,
                base::Unretained(this)))
    {
        CHECK(data_source_.Initialize(GetTestDataFilePath("bear-320x240.webm")));
    }

    virtual ~BlockingUrlProtocolTest()
    {
        data_source_.Stop();
    }

    MOCK_METHOD0(OnDataSourceError, void());

    FileDataSource data_source_;
    BlockingUrlProtocol url_protocol_;

private:
    DISALLOW_COPY_AND_ASSIGN(BlockingUrlProtocolTest);
};

TEST_F(BlockingUrlProtocolTest, Read)
{
    // Set read head to zero as Initialize() will have parsed a bit of the file.
    int64_t position = 0;
    EXPECT_TRUE(url_protocol_.SetPosition(0));
    EXPECT_TRUE(url_protocol_.GetPosition(&position));
    EXPECT_EQ(0, position);

    // Read 32 bytes from offset zero and verify position.
    uint8_t buffer[32];
    EXPECT_EQ(32, url_protocol_.Read(32, buffer));
    EXPECT_TRUE(url_protocol_.GetPosition(&position));
    EXPECT_EQ(32, position);

    // Read an additional 32 bytes and verify position.
    EXPECT_EQ(32, url_protocol_.Read(32, buffer));
    EXPECT_TRUE(url_protocol_.GetPosition(&position));
    EXPECT_EQ(64, position);

    // Seek to end and read until EOF.
    int64_t size = 0;
    EXPECT_TRUE(url_protocol_.GetSize(&size));
    EXPECT_TRUE(url_protocol_.SetPosition(size - 48));
    EXPECT_EQ(32, url_protocol_.Read(32, buffer));
    EXPECT_TRUE(url_protocol_.GetPosition(&position));
    EXPECT_EQ(size - 16, position);

    EXPECT_EQ(16, url_protocol_.Read(32, buffer));
    EXPECT_TRUE(url_protocol_.GetPosition(&position));
    EXPECT_EQ(size, position);

    EXPECT_EQ(0, url_protocol_.Read(32, buffer));
    EXPECT_TRUE(url_protocol_.GetPosition(&position));
    EXPECT_EQ(size, position);
}

TEST_F(BlockingUrlProtocolTest, ReadError)
{
    data_source_.force_read_errors_for_testing();

    uint8_t buffer[32];
    EXPECT_CALL(*this, OnDataSourceError());
    EXPECT_EQ(AVERROR(EIO), url_protocol_.Read(32, buffer));
}

TEST_F(BlockingUrlProtocolTest, GetSetPosition)
{
    int64_t size;
    int64_t position;
    EXPECT_TRUE(url_protocol_.GetSize(&size));
    EXPECT_TRUE(url_protocol_.GetPosition(&position));

    EXPECT_TRUE(url_protocol_.SetPosition(512));
    EXPECT_FALSE(url_protocol_.SetPosition(size + 1));
    EXPECT_FALSE(url_protocol_.SetPosition(-1));
    EXPECT_TRUE(url_protocol_.GetPosition(&position));
    EXPECT_EQ(512, position);

    EXPECT_TRUE(url_protocol_.SetPosition(size));
    EXPECT_TRUE(url_protocol_.GetPosition(&position));
    EXPECT_EQ(size, position);
}

TEST_F(BlockingUrlProtocolTest, GetSize)
{
    int64_t data_source_size = 0;
    int64_t url_protocol_size = 0;
    EXPECT_TRUE(data_source_.GetSize(&data_source_size));
    EXPECT_TRUE(url_protocol_.GetSize(&url_protocol_size));
    EXPECT_NE(0, data_source_size);
    EXPECT_EQ(data_source_size, url_protocol_size);
}

TEST_F(BlockingUrlProtocolTest, IsStreaming)
{
    EXPECT_FALSE(data_source_.IsStreaming());
    EXPECT_FALSE(url_protocol_.IsStreaming());

    data_source_.force_streaming_for_testing();
    EXPECT_TRUE(data_source_.IsStreaming());
    EXPECT_TRUE(url_protocol_.IsStreaming());
}

} // namespace media
